Speaker



FIG. 1 is a perspective view of a speaker showing my new design, wherein the right, left and rear views thereof all being identical to this FIG. 1 view;

FIG. 2 is a front elevational view of a speaker showing my new design, wherein the right, left and rear views thereof all being identical to this FIG. 2 view;

FIG. 3 is a top plan view of the speaker illustrated in FIG. 1; and,

FIG. 4 is a bottom plan view of the speaker illustrated in FIG. 1. 

The ornamental design for a speaker, as shown and described. 